Faculdade São Leopoldo Mandic, Campinas, Brasil.
Universidade Estadual de Campinas, Escola de Odontologia de Piracicaba, Departamento de Dentística Restauradora, Piracicaba, Brasil.
Acta Odontol Latinoam. 2024 Sep 30;37(2):162-171. doi: 10.54589/aol.37/2/162.
The color and the surface roughness of aesthetic restorations are related to the clinical sucess and longevity of these treatments. Aim: This study evaluated the influence of finishing and polishing systems, and storage media on the surface roughness and color stability of aesthetic restorative composites. Materials and Method: Cylindrical specimens (n=10) were prepared and treated according to: 1. Type of composite resin (nanofilled- Filtek Z350XT, suprananofilled- Estelite Omega, nanohybrid- Empress Direct); 2. Type of finishing and polishing systems (no polishing, aluminum oxide discs or abrasive rubber polishers); and 3. Type of immersion medium (water or coffee, 3 h/day/30 days). Surface roughness (Ra - μm) and color stability (L, ΔEab, and ΔE00) were evaluated at baseline (after polishing) and final time (after immersion). Data were subjected to Kruskal-Wallis, Mann-Whitney, Wilcoxon, and Student-Newman-Keuls tests (α=0.05). Results: Nanohybrid (p<0.001) and suprananofilled composite resins (p=0.004) showed an increase in Ra after polishing, regardless the finishing and polishing system. After immersion in coffee, the nanofilled composite had the highest roughness values (p=0.032). L values increased for all resins after polishing (p<0.05). Suprananofilled composites had the greatest color stability with the lowest values of ΔEab and ΔE00. Conclusions: Finishing and polishing systems had an impact on the surface roughness and color stability of all aesthetic resins, and their effectiveness depended on the type of composite resin.
美学修复的颜色和表面粗糙度与这些治疗的临床成功率和寿命有关。目的：本研究评估了抛光和打磨系统以及储存介质对美学修复复合材料表面粗糙度和颜色稳定性的影响。材料和方法：制备并处理圆柱形试件（n=10），具体为：1. 复合树脂类型（纳米复合-Filtek Z350XT、超纳米复合-Estelle Omega、纳米复合-Empress Direct）；2. 抛光和打磨系统类型（无抛光、氧化铝盘或研磨橡胶抛光器）；3. 浸泡介质类型（水或咖啡，每天 3 小时/30 天）。在基线（抛光后）和最终时间（浸泡后）评估表面粗糙度（Ra-μm）和颜色稳定性（L、ΔEab 和 ΔE00）。数据采用 Kruskal-Wallis、Mann-Whitney、Wilcoxon 和 Student-Newman-Keuls 检验（α=0.05）。结果：纳米复合（p<0.001）和超纳米复合复合材料在抛光后（无论抛光和打磨系统如何）Ra 值均增加。在咖啡浸泡后，纳米复合的粗糙度值最高（p=0.032）。所有树脂在抛光后 L 值均增加（p<0.05）。超纳米复合的颜色稳定性最好，ΔEab 和 ΔE00 值最低。结论：抛光和打磨系统对所有美学树脂的表面粗糙度和颜色稳定性有影响，其效果取决于复合材料的类型。
